Maximum energy loss in a vertical drop equipped with horizontal screen with downstream rough and smooth bed

Yonesi, Hojjat Allah; Daneshfaraz, Rasoul; Mirzaee, Reza; Bagherzadeh, Mohammad

doi:10.2166/ws.2023.005

Cited by 3 publications

(1 citation statement)

References 25 publications

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“…According to the research on the application of the screen as an energy dissipator in flow, various parameters related to the flow in a fixed bed, including the size of openings, multiple arrangements of screen alignments, spacing between screens and the angle of screen placement have been investigated (Abbaspour et al 2019;Sadeghfam et al 2019;Yonesi et al 2023). However, there has been a lack of research on a mobile bed after the screen.…”

Section: Introductionmentioning

confidence: 99%

Investigating scouring phenomenon in complementary channels with screen plates

Daneshfaraz,

Nezafat,

Abbaszadeh

et al. 2024

Preprint

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Recognizing the significance of scouring and implementing effective measures to mitigate and control its impact is paramount. This research delves into the examination of scouring downstream of hydraulic structures, employing screen plates as a pivotal component. To serve as energy absorbers, screen plates with varying aperture ratios of 40% and 50% have been strategically positioned at a distance of 1.5 m from the sluice gate. The primary focus is on evaluating the impact of screens on the maximum depth and length of the scour hole. Subsequently, a moving bed comprising particles of three distinct sizes (1.8, 2.6, and 5.2 mm) was selected. The outcomes of the study reveal that key parameters, including the thickness and opening ratio of the screens and their placement distance from the gate, significantly influence scouring. Notably, the maximum and minimum depths and lengths of the scour holes were observed in screens with opening ratios of 40% and 50%, respectively. Consequently, an increase in the opening ratio and thickness of the screens correlates with a reduction in the dimensions of scour holes, suggesting potential strategies for enhancing bridge resilience against scouring effects.

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Section: Introductionmentioning

confidence: 99%

Investigating scouring phenomenon in complementary channels with screen plates

Daneshfaraz,

Nezafat,

Abbaszadeh

et al. 2024

Preprint

Self Cite

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Impacts of bed roughness and orientation on hydraulic jump: A review

Agrawal,

Padhi

2024

Water Science and Engineering

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Experimental investigation on a new method for modifying the geometry of a vertical drop edge equipped with a screen on the amount of energy dissipation

Daneshfaraz,

Norouzi,

Abar

2024

Water Practice &Amp; Technology

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The aim of the current research is to investigate the effect of geometry and different angles (180°, 150°, 120° and 90°) of the edge of a vertical drop with a height of 0.15 m with and without a vertical screen on energy dissipation. The finding showed that the triangulation plane forms a vertical drop at different angles of 180°, 150°, 120° and 90° without a screen that increases the energy dissipation of the drop, which is highest at an angle of 90°, by 50.5%. In the vertical drop with a screen, reducing the angle also leads to a decrease in energy dissipation, so the highest energy dissipation occurs at an angle of 180° with a 45.2% increase in energy dissipation compared to the vertical drop without a screen. The relative depth of the edge and the relative depth of the vertical drop pool of the triangular plane are different at the angle vertex and its wings, in such a way that the relative depth of the edge at the vertex is less than the wings and the relative depth of the pool at the vertex is greater than the wings.

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Maximum energy loss in a vertical drop equipped with horizontal screen with downstream rough and smooth bed

Cited by 3 publications

References 25 publications

Investigating scouring phenomenon in complementary channels with screen plates

Investigating scouring phenomenon in complementary channels with screen plates

Impacts of bed roughness and orientation on hydraulic jump: A review

Experimental investigation on a new method for modifying the geometry of a vertical drop edge equipped with a screen on the amount of energy dissipation

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